CN114034538B - Enrichment device for dioxin detection and use method - Google Patents
Enrichment device for dioxin detection and use method Download PDFInfo
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- CN114034538B CN114034538B CN202111164140.9A CN202111164140A CN114034538B CN 114034538 B CN114034538 B CN 114034538B CN 202111164140 A CN202111164140 A CN 202111164140A CN 114034538 B CN114034538 B CN 114034538B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/405—Concentrating samples by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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Abstract
The invention relates to the technical field of dioxin detection, in particular to an enrichment device for dioxin detection and a use method thereof, comprising a shell, wherein a particle filtering shell and a storage bottle are arranged in an inner cavity of the shell, the inner cavity of the particle filtering shell is communicated with the outer wall of the shell, an air inlet pipe is arranged on the air inlet pipe, a gas flow sensor is arranged on the air inlet pipe, a filtering mechanism for filtering impurities is arranged in the inner cavity of the particle filtering shell, the storage bottle is used for filling organic solvent which is easy to absorb dioxin, a conveying pipe is arranged in the inner cavity of the storage bottle and the particle filtering shell, an air pump for extracting filtered gas is arranged on the conveying pipe, one end of the conveying pipe extends to the bottom of the storage bottle, an upper air outlet pipe is arranged on the storage bottle, a return pipe is arranged in the inner cavity of the storage bottle and the particle filtering shell, and valves are arranged on the return pipe and the air outlet pipe.
Description
Technical Field
The invention relates to the technical field of dioxin detection, in particular to an enrichment device for dioxin detection and a use method thereof.
Background
Dioxin is a colorless, odorless, and highly toxic fat-soluble substance.
Sources of dioxin in the atmosphere include iron and steel smelting, automobile exhaust, incineration production, pesticide manufacturing and the like, the occupation proportion of the incineration production is high, in order to control the content of the dioxin in the air, the national control of the emission standard of the dioxin is carried out, and then the emission amount of the dioxin is required to be accurately detected, the generated dioxin in the incineration production exists in two forms of gas and solid, the content of the dioxin in the incineration waste gas is low, and the dioxin is difficult to collect. When detecting dioxin generated in combustion waste gas, the existing detection device mainly collects dioxin in waste gas, ignores particulate matters attached to the dioxin in the waste gas, further causes low dioxin detection data results and even cannot detect the content of the dioxin, so how to design a device for efficiently gathering the dioxin and detecting the dioxin occupation ratio in the waste gas becomes a technical problem to be solved urgently by the technicians in the field.
Disclosure of Invention
In view of the above, the present invention aims to provide an enrichment device for detecting dioxin and a use method thereof, which improve the accuracy of detecting the content of dioxin.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an enrichment device and application method for dioxin detects, includes the casing, install granule filtration casing and accomodate the bottle in the inner chamber of casing, granule filtration casing's inner chamber and the outer wall intercommunication of casing are equipped with the intake pipe, install gas flow sensor in the intake pipe, be equipped with the filter equipment who filters impurity in granule filtration casing's the inner chamber, accomodate the bottle and be used for filling the organic solvent that easily absorbs dioxin, accomodate bottle and granule filtration casing's inner chamber intercommunication and be equipped with the conveyer pipe, install the air pump that is used for extracting the back gas of filtering on the conveyer pipe, the one end of conveyer pipe extends to accomodate the bottom of bottle, accomodate the bottle and be equipped with the outlet duct, the lower extreme of outlet duct is located accomodate bottle upper portion, and the upper end passes the casing and extends to the casing outside for accomodate bottle and external intercommunication, accomodate bottle with granule filtration casing's inner chamber intercommunication is equipped with the back flow pipe, the back flow pipe and all be equipped with the valve on the outlet duct, granule filtration casing's inner chamber and casing intercommunication are equipped with the pipeline of taking the closure, after detecting, it flows out to finish, the pipeline, the filter equipment is through the pipeline that the pipeline flows to the organic solvent from the casing to the filter tube through the casing.
According to the invention, impurities in combustion waste gas are filtered through the filter mechanism, dioxin attached to impurity particles is effectively collected, and simultaneously dioxin in the waste gas is absorbed through the storage bottle for storing organic solvent, so that double collection of solid and gaseous dioxin is realized, and compared with the traditional dioxin collecting equipment, the collection rate of dioxin is improved;
after the gas collection is finished, a valve on a return pipe is opened, the internal pressure of the storage bottle is higher than the pressure of the inner cavity of the particle filtering shell, the organic solvent enters the inner cavity of the particle filtering shell through the return pipe and adsorbs the attached dioxin, the organic solvent is fully utilized, the residual dioxin in the equipment is reduced, and the data accuracy is improved;
through gas flow sensor, can detect the combustion waste gas that gets into in the equipment, the entering amount of accurate record combustion waste gas draws the dioxin that attaches on organic solvent and the particulate matter, and then realizes the accurate calculation of dioxin content in the waste gas, reduces detection error.
Further, the filter mechanism comprises a fiber filter membrane and a folding frame for fixing the fiber filter membrane.
Further, the folding frame comprises a first arc-shaped rod, a second arc-shaped rod, a first rotating rod and a second rotating rod, wherein the first end of the first arc-shaped rod is hinged to the first end of the second arc-shaped rod, the second end of the first arc-shaped rod is hinged to the first end of the first rotating rod, the second end of the second arc-shaped rod is hinged to the first end of the second rotating rod, and the second end of the first rotating rod is hinged to the second end of the second rotating rod.
Further, the first end of the first arc-shaped rod and the first end of the second arc-shaped rod are rotatably provided with a first rotating shaft, a first torsion spring is sleeved on the first rotating shaft, and the first torsion spring provides power for the unfolding of the first arc-shaped rod and the second arc-shaped rod.
Further, a second rotating shaft is rotatably arranged between the second end of the first rotating rod and the second end of the second rotating rod, a second torsion spring is sleeved on the second rotating shaft, and the second torsion spring provides power for resetting of the first rotating rod and the second rotating rod.
Further, a push rod extending upwards out of the shell is connected to the first rotating rod or the second rotating rod, and the outer wall of the push rod is in sliding connection with the shell and the particle filtering shell.
Further, a second sealing ring sleeved on the outer side of the push rod is arranged on the particle filtering shell.
Further, the bottom end of the storage bottle is higher than the top end of the particle filtering shell, a first valve is arranged on the air outlet pipe, and a second valve is arranged on the return pipe.
Further, the inner chamber of granule filtration casing has seted up the seal groove with the intake pipe intercommunication, the seal groove lateral wall is equipped with sealed pivot, it is equipped with intake pipe confined closing plate to seal the pivot rotation, the cover is equipped with the third torsional spring in the sealed pivot, the one end and the closing plate of third torsional spring are fixed, its other end and seal groove lateral wall fixed connection.
The invention also provides an enrichment method for dioxin detection, which is used for enrichment by using the enrichment device for dioxin detection.
Further, when the enrichment device for dioxin detection is in an initial state, the organic solvent is injected into the storage bottle, so that one end of the gas transmission pipe extends to the position below the liquid level of the organic solvent in the storage bottle, the lower end of the gas outlet pipe is higher than the liquid level of the organic solvent, the gas inlet pipe is closed, the lower end of the gas outlet pipe is closed, the first torsion spring, the second torsion spring and the third torsion spring are in free states, the first valve and the second valve are closed, and the gas inlet pipe is connected with a combustion waste gas discharge channel; the using method comprises the following specific steps:
s1: starting an air pump and a gas flow sensor, and sucking gas in the inner cavity of the particle filtering shell by the air pump to generate negative pressure in the inner cavity of the particle filtering shell;
s2: when the pressure in the inner cavity of the particle filtering shell reaches a threshold value, the sealing plate rotates around the sealing rotating shaft to open the air inlet pipe, and the third torsion spring twists the storage force;
s3: the gas flow sensor detects inflow of waste gas, the combustion waste gas filters impurities through the fiber filter membrane, the waste gas is conveyed to the storage bottle through the air pump, dioxin in the waste gas is absorbed by organic solvent in the storage bottle, the rest waste gas is reserved in the storage bottle, the internal pressure of the storage bottle is increased, and the reaction time of the dioxin and the organic solvent is prolonged;
s4: after a period of time, stopping driving the air pump, at the moment, closing the air inlet pipe in time by the sealing plate under the action of the torsion moment of the third torsion spring, opening the pipeline, and reinstalling a pure storage bottle on the pipeline;
s5: the first rotating rod or the second rotating rod is pushed by the push rod to rotate around the second rotating shaft, the second torsion spring is twisted, the fiber filter membrane is folded and stored, the first arc-shaped rod and the second arc-shaped rod are abutted against the inner wall of the particle filter shell and rotate around the first rotating shaft, the first torsion spring is twisted, and the folding frame realizes the folding process and extends out of the shell to a pure storage bottle through a pipeline;
s6: opening a second valve, utilizing the internal pressure of the storage bottle to enable the organic solvent which absorbs dioxin to flow into the inner cavity of the particle filtration shell through the backflow pipe, opening the first valve when the internal pressure of the storage bottle is balanced with the pressure of the inner cavity of the particle filtration shell, and utilizing the height difference to enable the organic solvent to completely enter the inner cavity of the particle filtration shell, and enabling the organic solvent to absorb the dioxin absorbed by the inner cavity of the particle filtration shell and flow into a pure storage bottle through the pipeline;
s7: standing for a period of time to enable the dioxin to be fully absorbed by the organic solvent;
s8: and detecting the collected dioxin according to the combustion exhaust gas quantity entering the equipment detected by the gas flow sensor, and accurately calculating the dioxin duty ratio in the combustion exhaust gas.
The invention also provides an enrichment method for dioxin detection, which comprises the following steps:
s1: filtering particulate matters in the waste gas, and collecting dioxin in the filtered waste gas by using an organic solvent to obtain a first mixed solution;
s2: and (3) collecting the adsorbed dioxin on the filtered particulate matters by using the organic solvent in the step (S1) to obtain a second mixed solution, namely finishing the enrichment of the dioxin.
The invention also provides a dioxin detection system which comprises the enrichment device for dioxin detection.
Preferably, the dioxin detection system further comprises a dioxin content measuring device.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2A;
FIG. 4 is an enlarged schematic view of the structure of FIG. 2B;
FIG. 5 is a schematic view of the structure of a filter membrane folding frame;
FIG. 6 is an enlarged schematic view of the structure of FIG. 2C;
FIG. 7 is an exploded view of FIG. 6;
fig. 8 is an enlarged schematic view of the structure of fig. 2D.
Reference numerals: 11. a housing; 12. a pipe; 121. a threaded plug; 20. a particulate filtration housing; 21. a guide hole; 30. a push rod; 31. a first arcuate lever; 32. a second arcuate lever; 33. a first rotating shaft; 34. a first torsion spring; 35. a first rotating lever; 36. a second rotating lever; 37. a second rotating shaft; 38. a second torsion spring; 39. a glass fiber filter membrane; 40. a storage bottle; 41. a return pipe; 42. an air outlet pipe; 43. a delivery tube; 44. an air pump; 45. a first valve; 46. a second valve; 50. sealing grooves; 51. sealing the rotating shaft; 52. a sealing plate; 53. a third torsion spring; 61. an air inlet pipe; 62. a gas flow sensor; 63. a connector; 64. a first seal ring; 7. and a second sealing ring.
Detailed Description
The following detailed description of the invention is provided in connection with the accompanying drawings to facilitate understanding and grasping of the technical scheme of the invention.
Examples:
the embodiment provides an enrichment device for dioxin detection and a use method thereof, which are mainly used for collecting and detecting dioxin and improving the accuracy of dioxin detection data.
Including casing 11, install particle filtration casing 20 and accomodate bottle 40 in the inner chamber of casing 11, accomodate bottle 40 and select for use high pressure resistant steel bottle, the inner chamber of particle filtration casing 20 and the outer wall intercommunication of casing 11 are equipped with intake pipe 61, as shown in fig. 6, install the gas flow sensor 62 that detects the air input on the intake pipe 61, be equipped with the filter mechanism of filtering impurity in the inner chamber of particle filtration casing 20, accomodate bottle 40 and be used for filling the organic solvent that easily absorbs dioxin, accomodate bottle 40 and the inner chamber intercommunication of particle filtration casing 20 are equipped with conveyer pipe 43, install on the conveyer pipe 43 and be used for extracting the air pump 44 of being filtered the back gas by filter mechanism, accomodate bottle 40 inside conveyer pipe 43's lower extreme extends to accomodate bottle 40's bottom, accomodate bottle 40 in be equipped with outlet duct 42, outlet duct 42's lower extreme is located accomodate bottle 40's upper portion, and pass the upper end of outlet duct 42 is worn to the casing 11 outside for accomodate bottle 40 and external intercommunication, accomodate bottle 40 and the inner chamber intercommunication of casing 20 be equipped with the packing and easily absorb the organic solvent of dioxin, accomodate bottle 40 and the inner chamber intercommunication of casing 20 are equipped with the back-off valve, the back-flow pipe 12 is equipped with the filter tube 12 through the back-off valve, the back-flow pipe 12 is equipped with the filter tube 12, and the back-off filter tube 12 is equipped with the back-pipe 12, and is equipped with the back-filter tube 12, and is opened to the back-filter tube 12, and the inside 12 is equipped with the back-filter tube 12, and is opened, and the back-filter device is opened to the inside from the back-filter tube 12.
Specific:
in order to achieve the filtration of impurities in the gas, the filtration mechanism comprises a fiber filter membrane and a folding frame for fixing the fiber filter membrane, wherein the fiber filter membrane adopts a glass fiber filter membrane 39, and at least one layer of glass fiber filter membrane 39 or at least one folding frame is arranged in the fiber filter membrane, as shown in fig. 5.
In order to achieve folding of the folding frame, as shown in fig. 5, the folding frame includes a first arc rod 31, a second arc rod 32, a first rotating rod 35, and a second rotating rod 36, wherein a first end of the first arc rod 31 is hinged to a first end of the second arc rod 32, a second end of the first arc rod 31 is hinged to a first end of the first rotating rod 35, a second end of the second arc rod 32 is hinged to a first end of the second rotating rod 36, and a second end of the first rotating rod 35 is hinged to a second end of the second rotating rod 36.
Through the above arrangement, the assembly of the folding frame is realized through the articulated mode, when the articulated position of the first rotating rod 35 or the second rotating rod 36 is subjected to downward pressure, the first rotating rod 35 and the second rotating rod 36 rotate around the articulated point, the glass fiber filter membrane 39 is folded and deformed, and when the first rotating rod 35 and the second rotating rod 36 rotate to the limit positions, the first arc-shaped rod 31 and the second arc-shaped rod 32 are pushed to be abutted against the inner wall of the particle filtering shell 20, so that the first arc-shaped rod 31 and the second arc-shaped rod 32 rotate around the articulated point of the two, and the folding of the folding frame is realized.
In order to achieve the resetting of the first arc-shaped rod 31 and the second arc-shaped rod 32, in this embodiment, as shown in fig. 4 and 5, a first rotating shaft 33 is rotatably disposed at a first end of the first arc-shaped rod 31 and a first end of the second arc-shaped rod 32, and a first torsion spring 34 is sleeved on the first rotating shaft 33, where the first torsion spring 34 provides power for the unfolding of the first arc-shaped rod 31 and the second arc-shaped rod 32.
Through the above arrangement, after the extrusion forces received by the first arc-shaped rod 31 and the second arc-shaped rod 32 disappear, the first torsion spring 34 provides torsion moment for the first arc-shaped rod 31 and the second arc-shaped rod 32, so that the first arc-shaped rod 31 and the second arc-shaped rod 32 are reset, and the glass fiber filter membrane 39 is unfolded.
In order to achieve the resetting of the first rotating rod 35 and the second rotating rod 36, in this embodiment, as shown in fig. 4 and 5, a second rotating shaft 37 is rotatably disposed between the second end of the first rotating rod 35 and the second end of the second rotating rod 36, and a second torsion spring 38 is sleeved on the second rotating shaft 37, where the second torsion spring 38 provides power for resetting the first rotating rod 35 and the second rotating rod 36.
With the above arrangement, when the pushing force received by the first and second rotating levers 35 and 36 disappears, the second torsion spring 38 provides a torsion moment to return the first and second rotating levers 35 and 36.
In order to realize that the filtering mechanism extends out of the housing 11, in this embodiment, as shown in fig. 2, a push rod 30 extending out of the housing 11 upwards is connected to the first rotating rod 35, and an outer wall of the push rod 30 is slidably connected to the housing 11 and the particle filtering housing 20.
Through the arrangement, after the pipeline 12 is opened, the push rod 30 is pushed downwards, so that the first rotating rod 35 is applied with downward pressure, and the folding frame and the glass fiber filter membrane 39 are folded, so that the filter mechanism is pushed to extend out of the machine shell 11.
In order to seal the inner cavity of the particle filtering shell 20, in this embodiment, as shown in fig. 4, the particle filtering shell 20 is provided with a second sealing ring 7 sleeved on the outer side of the push rod 30, so as to effectively prevent the gas inside the inner cavity of the particle filtering shell 20 from leaking outwards through the gap between the push rod 30 and the particle filtering shell 20.
In order to completely flow the organic solvent in the storage bottle 40 into the inner cavity of the particle filtering shell 20 and out through the pipe 12, in this embodiment, as shown in fig. 2 and 3, the bottom end of the storage bottle 40 is higher than the top end of the particle filtering shell 20, the air outlet pipe 42 is provided with a first valve 45, and the return pipe 41 is provided with a second valve 46.
Through the arrangement, the bottom end of the storage bottle 40 is higher than the top end of the particle filtering shell 20, and when no pressure difference exists between the storage bottle 40 and the inner cavity of the particle filtering shell 20, the first valve 45 is opened, so that the organic solvent in the storage bottle 40 can smoothly flow into the inner cavity of the particle filtering shell 20; in the normal working process, after the air pump 44 stops working, the second valve 46 is opened, and as the pressure of the inner cavity of the storage bottle 40 is larger than the pressure of the inner cavity of the particle filtering shell 20 due to the accumulation of waste gas in the storage bottle 40, the organic solvent flows to the inner cavity of the particle filtering shell 20 through the return pipe 41, the first valve 45 is closed, the gas in the storage bottle 40 is limited to leak outwards, the pressure in the storage bottle 40 is increased, and simultaneously dioxin in the waste gas and the organic solvent are fully reacted, so that the full absorption of dioxin in the waste gas is ensured.
In order to control the opening and closing of the air inlet pipe 61, in this embodiment, as shown in fig. 6 and 7, a sealing groove 50 communicated with the air inlet pipe 61 is provided in the inner cavity of the particle filtering shell 20, a sealing rotating shaft 51 is provided on the side wall of the sealing groove 50, a sealing plate 52 for sealing the air inlet pipe 61 is rotatably provided on the sealing rotating shaft 51, a third torsion spring 53 is sleeved on the sealing rotating shaft 51, one end of the third torsion spring 53 is fixed with the sealing plate 52, and the other end is fixedly connected with the side wall of the sealing groove 50.
Through the above arrangement, when the air pump 44 is started, the air pump 44 pumps the air in the inner cavity of the particle filtering shell 20, so that the inner cavity of the particle filtering shell 20 generates negative pressure, when the pressure in the inner cavity of the particle filtering shell 20 reaches the threshold value, the pressure difference exists at two sides of the sealing plate 52, the external air flows into the inner cavity of the particle filtering shell 20 through the air inlet pipe 61, the sealing plate 52 rotates around the sealing rotating shaft 51 to drive the third torsion spring 53 to twist, and then the air inlet pipe 61 is opened, when the air pump 44 stops working, the pressure in the inner cavity of the particle filtering shell 20 is reduced, and at the moment, the third torsion spring 53 drives the sealing plate 52 to rotate around the sealing rotating shaft 51, the air inlet pipe 61 is closed again, and the waste gas is limited to enter the inner cavity of the particle filtering shell 20.
In order to connect the air inlet pipe 61 with an external device, in this embodiment, as shown in fig. 8, a connector 63 is sleeved at the end of the air inlet pipe 61, and a first sealing ring 64 is disposed between the connector 63 and the end of the air inlet pipe 61.
Through the above-mentioned setting, be connected with external equipment through connector 63, connector 63 and the butt of first sealing washer 64 prevent junction waste gas leakage this moment.
The implementation principle is as follows: the pipeline 12 is closed by the threaded plug 121, organic solvent is injected into the storage bottle 40, one end of the gas transmission pipe 43 extends to the position below the liquid level of the organic solvent in the storage bottle 40, the lower end of the gas outlet pipe 42 is higher than the liquid level of the organic solvent, the gas inlet pipe 61 is closed, the lower end of the pipeline 12 is closed, the first torsion spring 34, the second torsion spring 38 and the third torsion spring 53 are in free states, the first valve 45 and the second valve 46 are closed, and the gas inlet pipe 61 is connected with a combustion waste gas discharge channel;
s1: opening the air pump 44 and the air flow sensor 62, and sucking air in the inner cavity of the particle filtering shell 20 by the air pump 44 to generate negative pressure in the inner cavity of the particle filtering shell 20;
s2: when the pressure in the inner cavity of the particle filtering shell 20 reaches a threshold value, the sealing plate 52 rotates around the sealing rotating shaft 51 to open the air inlet pipe 61, and the third torsion spring 53 twists and stores the force;
s3: the gas flow sensor 62 detects inflow of waste gas, the combustion waste gas filters impurities through a fiber filter membrane, the waste gas is conveyed to the storage bottle 40 through the air pump 44, dioxin in the waste gas is absorbed by organic solvent in the storage bottle 40, and the rest waste gas is reserved in the storage bottle 40 to increase internal pressure of the storage bottle 40 and prolong reaction time of the dioxin and the organic solvent;
s4: after a period of time, the driving of the air pump 44 is stopped, at this time, the air inlet pipe 61 is timely closed by the sealing plate 52 under the action of the torsion moment of the third torsion spring 53, the pipeline 12 is opened, and a pure storage bottle is reinstalled on the pipeline 12;
s5: the first rotating rod 35 or the second rotating rod 36 is pushed by the push rod 30 to rotate around the second rotating shaft 37, the second torsion spring 38 is twisted, the fiber filter membrane is folded and stored, the first arc-shaped rod 31 and the second arc-shaped rod 32 are abutted against the inner wall of the particle filter shell 20 and rotate around the first rotating shaft 33, the first torsion spring 34 is twisted, and the folding frame realizes the folding process and extends out of the shell 11 to a pure storage bottle through the pipeline 12;
s6: opening a second valve 46, utilizing the internal pressure of the storage bottle 40 to enable the organic solvent with absorbed dioxin to flow into the inner cavity of the particle filtration shell 20 through the return pipe 41, opening the first valve 45 when the internal pressure of the storage bottle 40 is balanced with the pressure of the inner cavity of the particle filtration shell 20, utilizing the height difference to enable the organic solvent to completely enter the inner cavity of the particle filtration shell 20, and enabling the organic solvent to absorb the dioxin absorbed by the inner cavity of the particle filtration shell 20 and flow into a pure storage bottle through the pipeline 12;
s7: standing for a period of time to enable the dioxin to be fully absorbed by the organic solvent;
s8: the amount of combustion exhaust gas entering the apparatus is detected by the gas flow sensor 62, and dioxin collected by the apparatus is extracted for accurate calculation of the dioxin duty ratio in the combustion exhaust gas.
The foregoing is only exemplary of the invention, and many other embodiments of the invention are possible, and all modifications and variations of the invention are intended to fall within the scope of the invention.
Claims (5)
1. The utility model provides an enrichment device for dioxin detects, includes casing (11), its characterized in that: install granule filtration casing (20) and accomodate bottle (40) in the inner chamber of casing (11), the inner chamber of granule filtration casing (20) is equipped with intake pipe (61) with the outer wall intercommunication of casing (11), install gas flow sensor (62) on intake pipe (61), be equipped with the filter equipment who filters impurity in the inner chamber of granule filtration casing (20), filter equipment includes the fibrous filter membrane and with the fixed folding leg of fibrous filter membrane, the folding leg includes first arc pole (31), second arc pole (32), first dwang (35), second dwang (36), the first end of first arc pole (31) is articulated with the first end of second arc pole (32), the second end of first arc pole (31) is articulated with the first end of first dwang (35), the second end of second arc pole (32) is articulated with the first end of second dwang (36), the second end of first dwang (35) is equipped with the first torsion spring (33) and first arc of first arc pole (32), the first arc of first arc pole (33) is equipped with first arc-shaped torsion spring (33) and first arc-shaped first shaft (32), the utility model discloses a particle filter, including first swivelling lever (35), second swivelling lever (36), second swivelling lever (37) are equipped with second pivot (37) between the second end of swivelling lever, cover is equipped with second torsional spring (38) on second pivot (37), second torsional spring (38) provide power for the reset of first swivelling lever (35) and second swivelling lever (36), accomodate bottle (40) and be used for filling the organic solvent that easily absorbs dioxin, accomodate bottle (40) and the inner chamber intercommunication of particle filter housing (20) are equipped with conveyer pipe (43), install on conveyer pipe (43) and be used for extracting air pump (44) of post-filtration gas, the one end of conveyer pipe (43) extends to the bottom of accomodating bottle (40), accomodate bottle (40) are equipped with outlet duct (42), the lower extreme of outlet duct (42) is located accomodate bottle (40) upper portion, and upper end passes casing (11) and extends to the outside of accomodating bottle (11) for accomodating bottle (40) and external intercommunication, accomodate bottle (40) with the inner chamber intercommunication of particle filter housing (20) is equipped with back flow conduit (41), be equipped with back conduit (41) and casing (12) are equipped with on the back conduit (41) and casing (41) are equipped with the outer wall (12), the utility model discloses a particle filter shell, including granule filter shell, sealed groove (50) with intake pipe (61) intercommunication are seted up to the inner chamber of granule filter shell (20), sealed groove (50) lateral wall is equipped with sealed pivot (51), it is equipped with intake pipe (61) confined closing plate (52) to rotate on sealed pivot (51), the cover is equipped with third torsional spring (53) on sealed pivot (51), the one end and the closing plate (52) of third torsional spring (53) are fixed, its other end and sealed groove (50) lateral wall fixed connection.
2. The enrichment device for dioxin detection according to claim 1, wherein: the first rotating rod (35) or the second rotating rod (36) is connected with a push rod (30) extending upwards out of the shell (11), and the outer wall of the push rod (30) is in sliding connection with the shell (11) and the particle filtering shell (20).
3. The enrichment device for dioxin detection according to claim 2, wherein: the particle filtering shell (20) is provided with a second sealing ring (7) sleeved on the outer side of the push rod (30).
4. The enrichment device for dioxin detection according to claim 1, wherein: the bottom end of the containing bottle (40) is higher than the top end of the particle filtering shell (20), a first valve (45) is arranged on the air outlet pipe (42), and a second valve (46) is arranged on the return pipe (41).
5. The method of using an enrichment device for dioxin detection as claimed in any one of claims 1 to 4, characterized in that: when the enrichment device for dioxin detection is in an initial state, an organic solvent which is easy to absorb dioxin is filled in the storage bottle (40), one end of the gas transmission pipe (43) extends to the position below the liquid level of the organic solvent in the storage bottle (40), the lower end of the gas outlet pipe (42) is higher than the liquid level of the organic solvent, the gas inlet pipe (61) is closed, the lower end of the pipeline (12) is closed, the first torsion spring (34), the second torsion spring (38) and the third torsion spring (53) are in a free state, the first valve (45) and the second valve (46) are closed, and the gas inlet pipe (61) is connected with a combustion waste gas discharge channel; the using method comprises the following specific steps:
s1: opening an air pump (44) and a gas flow sensor (62), wherein the air pump (44) absorbs gas in the inner cavity of the particle filtering shell (20) to generate negative pressure in the inner cavity of the particle filtering shell (20);
s2: when the pressure in the inner cavity of the particle filtering shell (20) reaches a threshold value, the sealing plate (52) rotates around the sealing rotating shaft (51) to open the air inlet pipe (61), and the third torsion spring (53) twists and stores the force;
s3: the gas flow sensor (62) detects inflow of waste gas, the combustion waste gas filters impurities through a fiber filter membrane, the waste gas is conveyed to the storage bottle (40) through the air pump (44), dioxin in the waste gas is absorbed by organic solvent in the storage bottle (40), the rest waste gas is reserved in the storage bottle (40) to increase internal pressure of the storage bottle (40), and reaction time of the dioxin and the organic solvent is prolonged;
s4: after a period of time, the driving of the air pump (44) is stopped, at the moment, the air inlet pipe (61) is timely closed by the sealing plate (52) under the action of the torsion moment of the third torsion spring (53), the pipeline (12) is opened, and a pure storage bottle is reinstalled on the pipeline (12);
s5: the first rotating rod (35) or the second rotating rod (36) is pushed by the push rod (30) to rotate around the second rotating shaft (37), the second torsion spring (38) is twisted, the fiber filter membrane is folded and stored, the first arc-shaped rod (31) and the second arc-shaped rod (32) are abutted against the inner wall of the particle filtering shell (20) and rotate around the first rotating shaft (33), the first torsion spring (34) is twisted, the folding frame realizes the folding process and extends out of the shell (11) to a pure storage bottle through the pipeline (12);
s6: opening a second valve (46), utilizing the internal pressure of the storage bottle (40), flowing the organic solvent with absorbed dioxin into the inner cavity of the particle filtering shell (20) through a backflow pipe (41), when the internal pressure of the storage bottle (40) is balanced with the pressure of the inner cavity of the particle filtering shell (20), opening a first valve (45), utilizing the height difference, realizing that the organic solvent completely enters the inner cavity of the particle filtering shell (20), and absorbing the dioxin adsorbed by the inner cavity of the particle filtering shell (20) by the organic solvent and flowing the dioxin into a pure storage bottle through a pipeline (12);
s7: standing for a period of time to enable the dioxin to be fully absorbed by the organic solvent;
s8: and detecting the amount of combustion exhaust gas entering the equipment according to a gas flow sensor (62), and detecting collected dioxin for accurately calculating the dioxin duty ratio in the combustion exhaust gas.
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